telegram-bot-bash/examples/bash2env.sh

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#!/usr/bin/env bash
# file: bash2env.sh
# simole helper script to convert bash shebang from
# ! /bin/bash TO ! /usr/bin/env bash
# This file is public domain in the USA and all free countries.
# Elsewhere, consider it to be WTFPLv2. (wtfpl.net/txt/copying)
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# shellcheck disable=SC1117
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#### $$VERSION$$ v1.20-0-g2ab00a2
# adjust your language setting here
# https://github.com/topkecleon/telegram-bot-bash#setting-up-your-environment
export 'LC_ALL=C.UTF-8'
export 'LANG=C.UTF-8'
export 'LANGUAGE=C.UTF-8'
unset IFS
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MYSHEBANG=""
################
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# uncomment one of the following lines to make the conversion
# linux/unix bash
# MYSHEBANG="#!/bin/bash"
# BSD bash
# MYSHEBANG="#!/usr/bin/bash"
# homebrew gnu bash on MacOS
# MYSHEBANG="#!/usr/local/opt/bash"
# use portable /usr/bin/env
# MYSHEBANG="#!/usr/bin/env bash"
# bashbot default bash
FROMSHEBANG="#!/bin/bash"
# uncomment to convert back to bashbot default bash
# FROMSHEBANG="#!/usr/bin/env bash"
# MYSHEBANG="#!/bin/bash"
if [ "$1" = "" ] || [ "$1" = "-h" ] || [ "$1" = "--help" ]; then
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echo "$0: convert bash shebang to point to your local installation"
echo "usage: $0 script [script ...]"
exit
fi
# loop tomprocess files
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if [ "${MYSHEBANG}" != "" ]; then
echo "Warning, shebang will changed from ${FROMSHEBANG} changed to ${MYSHEBANG}!"
else
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echo "Dry run, demonstration only!"
echo "Uncomment one of the MYSHEBANG= lines fitting your environment to make the changes permanent."
fi
echo "Press enter to continue ..."
#shellcheck disable=SC2034
read -r CONTINUE
for file in "$@"
do
file "${file}"
if [[ "$(file -b "${file}")" =~ Bourne.*script.*text ]]; then
echo "Processing ${file} ..."
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if head -n 1 "${file}" | grep -q "^${FROMSHEBANG}"; then
if [ "${MYSHEBANG}" != "" ]; then
sed -i -e '1 s|^'"${FROMSHEBANG}"'|'"${MYSHEBANG}"'|' "${file}"
head -n 1 "${file}"
else
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sed -n -e '1 s|^'"${FROMSHEBANG}"'|#!/some/shebang/bash (dry run)|p' "${file}"
fi
else
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echo "Found: $(head -n 1 "${file}") - Nothing to convert."
fi
echo -e "... done.\n"
else
echo -e "Not a bash script, skipping ${file} ...\n"
fi
done